Carlos, you can choose to use JupyterLab or PyCharm. You cannot use both at the same time.
I would advise you to use JupyterLab as it is free and the support for it will only improve.
If you want to use PyCharm, it launches the Jupyter server for you. Read “How does it work behind the scenes?” in https://towardsdatascience.com/are-you-still-using-jupyterlab-ce1a4339c0a9